* {
  margin: 0;
  padding: 0;
}

a {
  text-decoration: none;
  color: white;
}

li {
  list-style-type: none;
}

nav {
  background-color: #25383C;
  text-align: center;
}

.nav-list-item a {
  color: white;
  display: block;
  padding: 20px 40px;
}



.nav-list-item:hover> ul {
  display: block;
}

.nav-submenu-list {
  display: none;

  background-color: #0fcfd7;
}

/*设置关闭按钮*/
.menu-item{
  border: none;
  padding: 8px 0;
}

.clearfix{
  content: '';
  display: block;
  clear: both;
}

.btn-icon-close{
  background: url("../images/cross.png") no-repeat center center;
}

.btn-icon-menu{
  background: url("../images/menu.png") no-repeat center center;
}

.menu-btn-icon{
  border: none;
  width: 30px;
  height: 30px;
  background-size: cover;/*保证图片始终覆盖容器*/
  float: left;
  cursor: pointer;
  margin-left: 10px;
  /*position: absolute;*/
  /*left: 0;*/
}










